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Investment Securities Investment Securities-Investments Classified by Contractual Maturity Date (Details) - USD ($) $ in Thousands | Sep. 30, 2019 | Mar. 31, 2019
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Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Fiscal Year Maturity |  |
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, within One Year, Amortized Cost | $ 1,001 |
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after One Through Five Years, Amortized Cost | 7,962 |
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after Five Through Ten Years, Amortized Cost | 15,392 |
Debt Securities, Available-for-sale, Allocated and Single Maturity Date, Maturity, after 10 Years, Amortized Cost | 50,650 |
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis | 75,005 |
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity |  |
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, within One Year, Fair Value | 1,000 |
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after One Through Five Years, Fair Value | 7,925 |
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after Five Through Ten Years, Fair Value | 15,377 |
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after 10 Years, Fair Value | 50,807 |
Available-for-sale | $ 75,109 | $ 79,845
Available-for-sale, Securities, Debt Maturities, within One Year, Weighted Average Rate | 1.65% |
Available-for-sale Securities, Debt Maturities, after One Through Five Years, Weighted Average Rate | 1.72% |
Available-for-sale Securities, Debt Maturities, after Five Through Ten Years, Weighted Average Rate | 2.63% |
Available-for-sale Securities, Debt Maturities, after Ten Years, Weighted Average Rate | 2.61% |
Available-for-sale Securities, Debt Maturities, Weighted Average Rate | 2.51% |
Held-to-maturity Securities, Debt Maturities, Net Carrying Amount |  |
Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, after One Through Five Years, Amortized Cost | $ 4,498 |
Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, after Five Through Ten Years, Amortized Cost | 4,144 |
Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, after 10 Years, Amortized Cost | 2,038 |
Held-to-maturity | 10,680 | 11,137
Held-to-maturity Securities, Debt Maturities, Fair Value, Fiscal Year Maturity |  |
Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, after One Through Five Years, Fair Value | 4,569 |
Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, after Five Through Ten Years, Fair Value | 4,226 |
Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, after 10 Years, Fair Value | 2,084 |
Held-to-maturity, Fair Value | $ 10,879 | $ 11,107
Debt Securities, Held-to-maturity, Maturity, after One Through Five Years, Weighted Average Yield | 2.40% |
Held-to-maturity Securities, Debt Maturities, after Five Through Ten Years, Weighted Average Rate | 3.35% |
Held-to-maturity Securities, Debt Maturities, after Ten Years, Weighted Average Rate | 2.86% |
Held-to-maturity Securities, Debt Maturities, Weighted Average Rate | 2.86% |

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- Definition Fair value of investment in debt security measured at amortized cost (held-to-maturity). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (aa) -URI http://asc.fasb.org/extlink&oid=118939692&loc=d3e27232-111563 + Details
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